Angular 2 expression parser and ng-init directive

Basically I'm looking for a way to implement a counterpart to Angular 1.x

ngInit

directive.

I'm aware of

ngOnInit

hook and the fact that it is the recommended place for initialization code. I consider

ngInit

directive a quick, declarative way to prototype or fix a component that shouldn't be generally used in well-written production code (although a developer has the right to choose what's best for him/her).